Breadcrumb

Synchronisation

According to The National Development Plan of the Energy Sector until 2030 (Approved on 20.10.2017 with an order no 285 of the Government of the Republic of Estonia) the long-term goal of the Estonian system operator is to achieve greater independence from the Russian Integrated Energy System and to synchronise the electricity system in Estonia (and other Baltic countries) with the Nordic or Continental Europe synchronous grid.

During the period covered in this Development Plan, Estonia's electricity transmission system will be reoriented from the former east-west flows to north-south flows. This process will be supported by the planned new interconnections between the Baltic countries and Central and Eastern Europe and Nordic countries, improving Estonia's connections with Central Europe and the Nordic countries.

From 2016, the transmission capacity between the Baltic countries and Central Europe is 500 MW (LitPolLink 1) and the capacity between the Baltic and Nordic countries 1,700 MW (in addition to Estlink 1 and 2, the 700 MW NordBalt interconnection between Lithuania and Sweden was completed at the end of 2015). The shortage of transmission capacity between Estonia and Latvia will be eliminated by 2019 after completion of the third trans-boundary transmission line. Strong integration of the Baltic power networks will make it possible to disconnect the Baltic electricity system from the North-West Russia synchronous grid and synchronise it with the Continental Europe or Nordic synchronous grid over the period 2025 - 2030. Investments in the development of the electricity transmission system in Estonia should support achievement of this goal.

Renovation of the Baltic-Tartu-Valmiera 330 kV overhead line

The renovation of the lines is necessary for ensuring dynamic stability to reinforce the connections between the Estonian electricity system’s production units and the rest of the electricity system in order to create preconditions for synchronous operation with the European electricity system. Desynchronization from the Russian electricity system will reduce the power grid transmission capacity between Latvia and Estonia. To preserve capacity at the current level and avoid limitations on north-south transit, it will be necessary to increase the capacity of the existing overhead lines.

Renovation of the Estonia-Tsirguliina-Valmiera 330 kV overhead line

Renovation timetable:
Replacement of the wire and trimming the clearance corridor of Eesti-Tsirguliina (L353) 2017-2018
Replacement of the wire and trimming the clearance corridor of Tsirguliina Valmiera (L354) 2015

The renovation of the lines is necessary for ensuring dynamic stability to reinforce the connections between the Estonian electricity system’s production units and the rest of the electricity system in order to create preconditions for synchronous operation with the European electricity system. Desynchronization from the Russian electricity system will reduce the power grid transmission capacity between Latvia and Estonia. To preserve capacity at the current level and avoid limitations on north-south transit, it will be necessary to increase the capacity of the existing overhead lines.

Renovation of the Baltic-Tartu-Valmiera 330 kV overhead line

The renovation of the lines is necessary for ensuring dynamic stability to reinforce the connections between the Estonian electricity system’s production units and the rest of the electricity system in order to create preconditions for synchronous operation with the European electricity system. Desynchronization from the Russian electricity system will reduce the power grid transmission capacity between Latvia and Estonia. To preserve capacity at the current level and avoid limitations on north-south transit, it will be necessary to increase the capacity of the existing overhead lines.

Renovation of the Estonia-Tsirguliina-Valmiera 330 kV overhead line

Renovation timetable:
Replacement of the wire and trimming the clearance corridor of Eesti-Tsirguliina (L353) 2017-2018
Replacement of the wire and trimming the clearance corridor of Tsirguliina Valmiera (L354) 2015

The renovation of the lines is necessary for ensuring dynamic stability to reinforce the connections between the Estonian electricity system’s production units and the rest of the electricity system in order to create preconditions for synchronous operation with the European electricity system. Desynchronization from the Russian electricity system will reduce the power grid transmission capacity between Latvia and Estonia. To preserve capacity at the current level and avoid limitations on north-south transit, it will be necessary to increase the capacity of the existing overhead lines.